Metal door frames



- 12, 1958 A. G. w. WEDBERG 2,846,868

METAL DOOR FRAMES Filed June 10, 1953 JDl/en/crx- United States Patent METAL DOOR FRAMES Axel Gustaf Werner Wedberg, Stockholm, Sweden Application June 10, 1953, Serial No. 360,790

7 Claims. (CI. 72-98) The present invention refers to metallic door frames and has for its object, first, to provide a strong and durable bond between the frame and the wall to withstand the heavy strains produced when the door is. rapidly closed up, whereby clearances or cracks between the frame and the plaster of the wall are prevented, and, second, to provide a frame, wherein its two vertical members are adapted to be mounted with the horizontal member without being subjected to special work in the place of erection.

The invention is illustrated in the accompanying drawing, wherein Fig. 1 shows a cross section of a door frame according to the invention as applied to a wall with plaster. Figs. 2, 3 and 4 show a door frame to a reduced scale in a modified simpler construction together with an anchor plate viewed from above and from the side, respectively.

The door frame, which consists of a sheet-metal strip 1, is of a substantially U-shaped construction with rightangled corners and with a fillet 2 projecting from the intermediate portion, said fillet forming an abutment for a door (not shown). The sides of the door frame enclosing the wall 3, which is built up from slabs, are first of a plane configuration 4 according to Fig. 1 and are then bent to an arcuate outward configuration 5 to form a plaster ground, after which they are bent inwardly toward the wall 6, while being formed at the edges thereof into a longitudinally extending channel 7. The edge 5 forms a support for the plaster 8, and serves to prevent the plastering tools from engaging the side 4 in the door frame. According to Fig. 2, the sides 4 of the door frame are plane. The metal frame forms a mould for mortar or concrete 9, so that the tightening efiect between the metal and the wall becomes very good and durable.

To secure the metal frame 1 to the wall and to provide a strong bond between the frame and the wall, anchor plates from sheet-metal are made use of, said anchor plates being inserted into the joints between the wall slabs. The anchor plates are provided with projections or hooks 11 and with downwardly bent tongues 12 with some clearance inside said projections. The anchor plates are provided with means to secure them to the mortar in the joints between the wall slabs, said means comprising pressed-out flanges, studs or the like 13. In arranging the anchor plates they are brought onto the door frame while being kept in an oblique position, so that the play between the hooks 11 and the tongues 12 is increased, and under such circumstances there is nothing to prevent them from being displaced along the metal frame, the hooks 11 then sliding on the rear side of the channels 7, whereas the tongues 12 slide on the inside of the channels. After a sufiicient number of anchor plates have been suspended on the door frame, they are moved downwardly, one at a time and still in an oblique position, until they are brought to the slab layer on which the anchor plate is to rest, when it is brought down to the horizontal position. The play between the hooks 11 and the tongues 12 is thus reduced, whereby the hooks and tongues are caused to grasp very powerfully about the channel 7, as will be seen from Fig. 2. The door frame is now stayed against the strains 2,846,868 Patented Aug. 12, 1958 or backwardly; the bond is thus a very strong one. This is one of the principal features of the present invention. An anchor plate secured to the floor may also serve to retain the foot end of the door frame. The anchor plate may also be used to secure a door frame in any place of a wall.

What I claim is:

1. In a building construction, the combination of a sheet metal door frame having a vertical jamb member of U-shaped cross-section and having the arms of the U formed inwardly towards each other and terminating in vertical locking edges with said locking edges separated from each other horizontally, said locking edges being of channel form with the open sides of the channels facing outwardly away from the body of the channel, vertically aligned wall slabs extended between the locking edgesand into the U-space of the jamb member, and means to look all of said parts together comprising horizontal anchor plates seated between vertically successive wall slabs at the location of the door jamb, each anchor plate comprising a flat body element seated between a pair of slabs at the location of the door jamb member and including an endwise extending and outwardly reaching hook shaped projection at each lateral edge of said body element together with an endwise extending tongue spaced laterally outwardly away from each hook shaped projection and separated from such projection a distance to leave an L-shaped slot between such projection and tongue, the width of the anchor plate being'such as to accommodate the channel form locking edges of the proximate arms of the door jamb in the L-shaped slots of the anchor plate with the tongues aforesaid in locking engagement of the channels of the arms of the door jamb.

2. Means as defined in claim 1, wherein the tongues are deflected from the plane of the body member in angular direction to such plane.

3. Means as defined in claim 1, wherein the locking edge channels of the arms of the U-shaped cross-section jamb are of rounded floor form with the concave faces of such channels looking towards the corresponding tongues of the anchor plates.

4. Means as defined in claim 3, wherein the tongues are deflected from the plane of the body member in angular direction to such plane.

5. Means as defined in claim 1, together with plasterlike material Within the U of the door jamb and enclosing that portion of the wall slabs which extends into such U, and surrounding and enclosing the vertical locking edges, and the hook shaped projections and the tongues of the anchor plates.

6. Means as defined in claim 5, together with plasterlike material on the exposed surfaces of the wall slabs.

7. Means as defined in claim 6, wherein there are vertical edge-like projections extending outwardly from the arms of the U-shaped jamb member to a location laterally outward from the surfaces of the said arms.

References Cited in the file of this patent UNITED STATES PATENTS 1,085,605 Gunn Feb. 3, 1914 1,361,586 Johnson Dec. 7, 1920 1,600,981 Goddard Sept. 28, 1926 1,654,293 Lamm Dec. 27, 1927 1,747,415 Baum Feb. 18, 1930 1,985,150 Collins Dec. 18, 1934 2,499,278 Olsen Feb. 28, 1950 2,652,907 Miller Sept. 22, 1953 FOREIGN PATENTS 454,156 Great Britain Sept. 21, 1936 

